From: Colin King <colin.king@canonical.com>
To: Florian Fainelli <f.fainelli@gmail.com>,
Andrew Lunn <andrew@lunn.ch>,
Vivien Didelot <vivien.didelot@gmail.com>,
Vladimir Oltean <olteanv@gmail.com>,
"David S . Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
netdev@vger.kernel.org
Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] net: dsa: b53: Fix dereference of null dev
Date: Sat, 12 Jun 2021 15:44:07 +0100 [thread overview]
Message-ID: <20210612144407.60259-1-colin.king@canonical.com> (raw)
From: Colin Ian King <colin.king@canonical.com>
Currently pointer priv is dereferencing dev before dev is being null
checked so a potential null pointer dereference can occur. Fix this
by only assigning and using priv if dev is not-null.
Addresses-Coverity: ("Dereference before null check")
Fixes: 16994374a6fc ("net: dsa: b53: Make SRAB driver manage port interrupts")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
drivers/net/dsa/b53/b53_srab.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/net/dsa/b53/b53_srab.c b/drivers/net/dsa/b53/b53_srab.c
index aaa12d73784e..e77ac598f859 100644
--- a/drivers/net/dsa/b53/b53_srab.c
+++ b/drivers/net/dsa/b53/b53_srab.c
@@ -629,11 +629,13 @@ static int b53_srab_probe(struct platform_device *pdev)
static int b53_srab_remove(struct platform_device *pdev)
{
struct b53_device *dev = platform_get_drvdata(pdev);
- struct b53_srab_priv *priv = dev->priv;
- b53_srab_intr_set(priv, false);
- if (dev)
+ if (dev) {
+ struct b53_srab_priv *priv = dev->priv;
+
+ b53_srab_intr_set(priv, false);
b53_switch_remove(dev);
+ }
return 0;
}
--
2.31.1
next reply other threads:[~2021-06-12 14:44 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-12 14:44 Colin King [this message]
2021-06-12 15:02 ` [PATCH] net: dsa: b53: Fix dereference of null dev Vladimir Oltean
2021-06-14 11:28 ` Dan Carpenter
2021-06-15 8:33 ` Colin Ian King
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